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Finding the Fourth Proportional to 3,012, 4,517.28 and 931.44

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Solution

The fourth proportional to 3,012, 4,517.28 and 931.44 is: 1,396.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,012 : 4,517.28 = 931.44 : x
  2. Step 2: Convert to fraction form
    3,012/4,517.28 = 931.44/x
  3. Step 3: Cross multiply
    3,012x = 4,517.28 × 931.44
  4. Step 4: Simplify right side
    3,012x = 4,207,575.28
  5. Step 5: Solve for x
    x = 4,207,575.28/3,012
  6. Step 6: Final answer
    x = 1,396.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.